《BS-2745-2-1993.pdf》由会员分享，可在线阅读，更多相关《BS-2745-2-1993.pdf（18页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS 2745-2: 1993 Washer-disinfectors for medical purposes Part 2: Specification for human waste container washer-disinfectors Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:58:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2745-2:1993 This
2、British Standard, having been prepared under the direction of the Laboratory Apparatus Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 November 1993 BSI 02-1999 First published, as BS 2745, May 1956 Second edition February 1966 Third e
3、dition as BS 2745-2 November 1993 The following BSI references relate to the work on this standard: Committee reference LBC/35 Draft for comment 92/50002 DC ISBN 0 580 22015 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Laboratory Ap
4、paratus Standards Policy Committee (LBC/-) to Technical Committee LBC/35, upon which the following bodies were represented; Association of British Health Care Industries Association of National Health Service Supplies Officers Association of Sterilizer and Disinfector Equipment Manufacturers British
5、 Dental Trade Association Central Sterilising Club Department of Health Health and Safety Executive Infection Control Nurses Association Institute of Hospital Engineering Institute of Purchasing and Supply Institute of Sterile Services Management Joint Committee of Professional Nursing, Midwifery an
6、d Health Visiting Associations (England) Medical Sterile Products Association National Blood Transfusion Service Public Health Laboratory Service Regional Hospital Boards Engineers Association Royal College of Pathologists Royal Pharmaceutical Society of Great Britain Society for General Microbiolog
7、y Stainless Steel Fabricators Association of Great Britain The following bodies were also represented in the drafting of the standard, through a subcommittee: BLWA Ltd. (The Association of the Laboratory Supply Industry) Healthcare Sanitary Systems Association Hospital Infection Society National Hea
8、lth Service Regional Engineers Association Water Research Centre Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:58:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2745-2:1993 BSI 02-1999i Contents Pag
9、e Committees responsible Inside front cover Foreword ii 1 Scope1 2 References1 3 Definitions1 4 Water treatment and detergents1 5 Doors and their controls1 6 Process information1 7 Instrumentation and controls2 8 Venting, drainage and purging2 9 Load handling and supports2 10 Ductwork2 11 Performanc
10、e2 12 Test documentation3 13 Information to be supplied by the manufacturer at tender stage3 14 Information to be supplied by the purchaser to the manufacturer3 Annex A (normative) Test for fluid and water vapour emission4 Annex B (normative) Test for drain seal integrity4 Annex C (normative) Test f
11、or load contamination4 Annex D (normative) Test for purging of the trap5 Annex E (normative) Test for flushing of non-absorbent materials5 Annex F (normative) Test for flushing of toilet tissues6 Annex G (normative) Test for protection against blocked drain fault6 Annex H (normative) Test for safety
12、 of manual emptying of containers8 Annex J (normative) Test for soil removal8 Annex K (normative) Test for thermal disinfection9 Figure D.1 Test rig for purging and flushing tests7 List of references Inside back cover Licensed Copy: London South Bank University, London South Bank University, Tue Dec
13、 12 08:58:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2745-2:1993 ii BSI 02-1999 Foreword It is recommended that this foreword be read in conjunction with the foreword to BS 2745-1. This Part of BS 2745 has been prepared under the direction of the Laboratory Apparatus Standards Policy Committee
14、. Together with Parts 1 and 3, it supersedes BS 2745:1966, which is withdrawn. The first edition of BS 2745, which was published in 1956, with a second edition in 1966, applied to bedpan and urine bottle washers operating on a choice of any one of three specified washing sequences. However, in this
15、revision, the structure of BS 2745 has been changed so that the general requirements applicable to all washer-disinfectors are now given in Part 1. This Part includes details specific to equipment for emptying, cleaning and disinfecting containers used to hold human waste intended for disposal, such
16、 as: portable sanitary pans (see BS 2588); hospital holloware (see BS 5452); urine bottles (see BS 3215); suction bottles; and products similar to the above and used for similar types of purpose. Requirements for washer-disinfectors for other medical purposes except linen are specified in Part 3 of
17、this standard. Washer-disinfectors for human waste containers are loaded manually. In order to reduce the risk of spillage and the generation of aerosols, most machines incorporate means to empty the containers automatically, e.g. by the action of closing the door. Where equipment does not provide a
18、utomatic emptying facilities, extra care is needed by the user. However, in the case of urinals, it is common practice for them to be emptied during loading by the operator and most washer-disinfectors are designed for this procedure. When this is not acceptable, the purchaser should discuss possibl
19、e alternative procedures with the manufacturer. The efficacy of disinfection may be impaired if soil removal is incomplete before commencement of a disinfection process (see the foreword and clause 13 of BS 2745-1:1993). Manufacturers literature should describe loading procedures designed to ensure
20、effective cleaning of soiled surfaces (see clause 13). The reliability of a washer-disinfector for human waste containers will be seriously affected if connected to a poorly designed drainage system, and the purchaser, therefore, is recommended to refer to BS 8301, a code of practice for building dr
21、ainage. Product certification. Users of this British Standard are advised to consider the desirability of third party certification of product conformity with this British Standard, based on testing and continuing product surveillance which may be coupled with assessment of a suppliers quality syste
22、ms against the appropriate Part of BS 5750. Enquiries as to the availability of third party certification schemes are forwarded by BSI to the Association of Certification Bodies. If a third party certification scheme does not already exist, users should consider approaching an appropriate body from
23、the list of Association members. Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:58:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2745-2:1993 BSI 02-1999iii Alternatively, users of this British Standard may wish to consider the desirability of assessment a
24、nd registration of a suppliers quality systems against the appropriate Part of BS 5750 by a third party certification body. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance
25、with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 10, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had
26、amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 08:58:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London Sou
27、th Bank University, Tue Dec 12 08:58:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2745-2:1993 BSI 02-19991 1 Scope This Part of BS 2745 specifies particular requirements for washer-disinfectors intended to be used for the washing and thermal disinfection of containers used to hold human waste fo
28、r disposal, by means of one operating cycle. These requirements apply in addition to the general requirements specified in BS 2745-1:1993. Clause 14 gives additional information to be supplied by the purchaser, if required by the manufacturer. Ventilation ducting is outside the scope of this Part of
29、 BS 2745, but as it is an essential part of a total system, guidance for the purchaser has been included in Annex E of BS 2745-1:1993. 2 References 2.1 Normative references This Part of BS 2745 incorporates, by reference, provisions from specific editions of other publications. These normative refer
30、ences are cited at the appropriate points in the text and the publications are listed on the inside back cover. Subsequent amendments to, or revisions of, any of these publications apply to this Part of BS 2745 only when incorporated in it by updating or revision. 2.2 Informative references This Par
31、t of BS 2745 refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. 3 Definitions For the purposes of this Part of BS 274
32、5, the definitions given in BS 2745-1:1993 apply, together with the following. 3.1 human waste unwanted excretions and body fluids including faeces, urine, blood, pus, vomit and mucus 3.2 containers vessels for holding and transporting human waste 3.3 toilet tissue tissue with an absorbency conformi
33、ng to A.2.1 of BS 5503-3:1990 3.4 test soil substance used to test the washing efficacy of the washer-disinfectors 3.5 hot start condition where the time interval between a test operating cycle and the previous operating cycle is less than 15 min 3.6 cold start condition where the time interval betw
34、een a test operating cycle and the previous operating cycle exceeds 60 min 3.7 free steaming generator system which produces steam by boiling water at atmospheric pressure 3.8 stored energy generator system where thermal energy (usually pressurized steam or hot water) is generated and stored for rap
35、id transfer to the load 4 Water treatment and detergents If specified by the purchaser, a system shall be provided for the injection of a descalant and/or a detergent. A means shall be provided to control the volume of additives; the control shall be adjustable and shall deliver within 10 % of the s
36、et volume with a resolution of not greater than 10 cm3 or 10 g, as applicable. Where an injection system is provided, a final rinse (see note to 6.2) shall be included in the process to minimize the residues from the additives used. NOTEThe volume required to be dispensed can vary with the agent use
37、d and water quality. 5 Doors and their controls In addition to conformity to 8.1.1 of BS 2745-1:1993, when tested in accordance with Annex A, there shall be no visible sign of fluid or vapour emission from the washer-disinfector (see also clause 8). NOTEUnless closure is totally effective potentiall
38、y hazardous aerosols, generated by the use of high pressure water jets, may leak from the chamber. 6 Process information 6.1 The washer-disinfector shall conform to clause 13 of BS 2745-1:1993 except that the main wash (see 13.1 of BS 2745-1:1993) shall be optional. 6.2 In addition to conformity to
39、11.3 of BS 2745-1:1993, the surface temperatures of the load, when accessible to the operator, (including removable load supports) shall not exceed the values given in the Electrical Safety Code for Hospital Laboratory Equipment (ESCHLE) 1. Licensed Copy: London South Bank University, London South B
40、ank University, Tue Dec 12 08:58:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2745-2:1993 2 BSI 02-1999 NOTEStored water should conform to the guidance notes on water systems used in healthcare premises given in the Department of Health and Social Security and Welsh Office publication Control of
41、 legionellae in healthcare premises 2. 7 Instrumentation and controls 7.1 The washer-disinfector shall conform to clause 14 of BS 2745-1:1993, with the exceptions given in 7.2 to 7.4. 7.2 A chamber temperature indicating instrument shall not be mandatory. 7.3 Where a chamber temperature indicating i
42、nstrument is fitted, the upper scale mark shall exceed the maximum operating temperature by 25 %. 7.4 Means shall be provided to adjust the disinfection temperature over a range between 70 C and 100 C. Adjustment shall be by means of a code, key or tool. 8 Venting, drainage and purging 8.1 General T
43、he washer-disinfector shall conform to 17.1 and 17.2 of BS 2745-1:1993 and, in addition, to 8.2 to 8.4. NOTEGuidance on ventilation ducting is given in Annex E of BS 2745-1:1993. 8.2 Venting When tested in accordance with Annex A, there shall be no visible signs of discharge of vapour or aerosol int
44、o the working area (see also clause 5). NOTEAvoidance of discharge of vapour or aerosol into the working area may be achieved by connection to a remote discharge or by the use of a condenser. When tested in accordance with Annex B, the water seal in the trap between the chamber and the drain shall n
45、ot be broken during five consecutive operating cycles. 8.3 Condensate Any condensate draining from ducting or a condenser into the chamber shall not contaminate the load. Testing shall be carried out in accordance with Annex C. At the end of the test all surfaces of all the containers shall be free
46、from detectable traces of water. 8.4 Purging 8.4.1 When tested in accordance with Annex D, the mean volume of water discharged in each operating cycle shall exceed 15 l. 8.4.2 After the completion of the washing stage of the operating cycle the trap shall be clear of soil and waste. Testing shall be
47、 carried out in accordance with Annex E and Annex F. In each of the five tests carried out in accordance with Annex E, the test sphere shall be discharged into the solids catchment sieve. After each of the five tests carried out in accordance with Annex F, all the toilet tissue sheets shall have bee
48、n discharged into the solids catchment sieve and the trap shall be clear. 8.5 Blocked drain fault The washer-disinfector shall conform to clause 15 of BS 2745-1:1993, except for 15.4b. If, after the completion of an operating cycle, the water level in the chamber remains above the lowest point of th
49、e chamber door seal, the control system shall cause a fault to be indicated and prevent access to the load without the use of a tool, code or key. When tested in accordance with Annex G, once the water level is above the lowest point of the door seal at the end of an operating cycle, a fault indication shall be given and it shall not be possible to open the door of the washer-disinfector using the normal release procedure. 9 Load handling and supports In addition to conformity to clause 18 of BS 2745-1:1993, the washer-disinfector shall be designed to pr